On #ThisDayinHistory 2003, the East Coast of the United States, and some parts of Canada, went dark around 4:10 p.m. Twenty-one power plants shut down in only three minutes, leaving an estimated 50 million people without power...in 90-degree heat. In large cities, including New York, Cleveland, Detroit, Toronto and Ottawa, key operations, such as subways, commuter trains, cell phone transmitters and banks, were suddenly rendered out of commission. While power was restored in some areas by 11 p.m., most would not get their power back for two days. #Blackout#15yearsago#NYC#history#Electricity